[asthmamax11]

Originally Posted by KingLT1

On old setup I made 600whp @ 7.5psi on E80 fuel with LT4 injectors, LPE HPFP, LT4 low side and JMS. Cat deletes, regular rotofab, and ported 95mm tb.

We are running a JMS on my brothers ZL1. It made 660/650 on a Mustang dyno that reads 5-6% lower then a DJ. It has +30 injectors, LPE HPFP, Headers, 14psi, E60 fuel. Turning the rail pressure down for the larger injectors and pump took strain off the low side.

So imo the LT4 low side pump with a JMS can probably go mid 7xx whp with the right setup.

I would suggest factoring any potential future goals before spending money on fueling. The LT4 high side will allow you to run E50-60 where you are now and it's pretty much maxed. If you did +30's and LPE HPFP, you could run full E or turn up the boost and run E60.

This is based around a .82 Lambda AFR target.

Thank you for this info
You have been the guru here on LT4 fueling and boost
I will be happy with 600whp as long as it is consistent

I am still on stock clutch and drivetrain